php 经典的分页代码类 这是一款php分页代码是一款经典的可自动判断url参数再进行分页的实例代码，同时自定了上页，下页，首页，尾页哦，同时还支持select下拉框跳转代码。
php教程 经典的分页代码类
这是一款php分页代码是一款经典的可自动判断url参数再进行分页的实例代码，同时自定了上页，下页，首页，尾页哦，同时还支持select下拉框跳转代码。
*/
class page{
var $page_name="page";
var $next_page='下一页';
var $pre_page='上一页';
var $first_page='首页';
var $last_page='尾页';
var $pre_bar='<<';
var $next_bar='>>';
var $format_left='';
var $format_right='';
var $pagebarnum=5;
var $totalpage=0;
var $nowindex=1;
var $url="";
var $offset=0;
var $rewrite = array();
function page($array)
{
if(is_array($array)){
if(!array_key_exists('total',$array))$this->error(__function__,'need a param of total');
$total=intval($array['total']);
$perpage=(array_key_exists('perpage',$array))?intval($array['perpage']):10;
$nowindex=(array_key_exists('nowindex',$array))?intval($array['nowindex']):'';
$url=(array_key_exists('url',$array))?$array['url']:'';
$action = (array_key_exists('action', $array)) ? $array['action'] : '';
$id0 = (array_key_exists('id0', $array)) ? $array['id0'] : '';
$id1 = (array_key_exists('id1', $array)) ? $array['id1'] : '';
$id2 = (array_key_exists('id2', $array)) ? $array['id2'] : '';
$id3 = (array_key_exists('id3', $array)) ? $array['id3'] : '';}else{
$total=$array;
$perpage=10;
$nowindex='';
$url='';
$action = '';
$id0 = '';
$id1 = '';
$id2 = '';
$id3 = '';}
if((!is_int($total))||($total<0))$this->error(__function__,$total.' is not a positive integer!');
if((!is_int($perpage))||($perpage<=0))$this->error(__function__,$perpage.' is not a positive integer!');
if(!empty($array['page_name']))$this->set('page_name',$array['page_name']);
$this->_set_nowindex($nowindex);
$this->_set_url($url);
$this->totalpage=ceil($total/$perpage);
$this->offset=($this->nowindex-1)*$perpage;
$this->action = $action;
$this->rewrite = array('action'=>$action,'id0'=>$id0, 'id1'=>$id1, 'id2'=>$id2, 'id3'=>$id3);
}function set($var,$value)
{if(in_array($var,get_object_vars($this)))
$this->$var=$value;
else {
$this->error(__function__,$var." does not belong to pb_page!");
}
}
function next_page($style=''){
if($this->nowindex<$this->totalpage){
return $this->_get_link($this->_get_url($this->nowindex+1),$this->next_page,$style);
}
return ''.$this->next_page.'';
}function pre_page($style=''){
if($this->nowindex>1){
return $this->_get_link($this->_get_url($this->nowindex-1),$this->pre_page,$style);
}
return ''.$this->pre_page.'';
}function first_page($style=''){
if($this->nowindex==1){
return ''.$this->first_page.'';
}
return $this->_get_link($this->_get_url(1),$this->first_page,$style);
}function last_page($style=''){
if($this->nowindex==$this->totalpage||$this->totalpage==0){return ''.$this->last_page.'';
}
return $this->_get_link($this->_get_url($this->totalpage),$this->last_page,$style);
}
function nowbar($style='',$nowindex_style='')
{
$plus=ceil($this->pagebarnum/2);
if($this->pagebarnum-$plus+$this->nowindex>$this->totalpage)$plus=($this->pagebarnum-$this->totalpage+$this->nowindex);
$begin=$this->nowindex-$plus+1;
$begin=($begin>=1)?$begin:1;
$return='';
for($i=$begin;$i<$begin+$this->pagebarnum;$i++)
{
if($i<=$this->totalpage){
if($i!=$this->nowindex)
$return.=$this->_get_text($this->_get_link($this->_get_url($i),$i,$style));
else
$return.=$this->_get_text(''.$i.'');
}else{
break;
}
$return.="n";
}
unset($begin);
return $return;
}
/**
* 获取显示跳转按钮的代码
*
* @return string
*/
function select()
{
$return=''; for($i=1;$i<=$this->totalpage;$i++) { if($i==$this->nowindex){ $return.=''.$i.''; }else{ $return.=''.$i.''; } } unset($i); $return.='';
return $return;
}
/**
* 获取mysql教程 语句中limit需要的值
*
* @return string
*/
function offset()
{
return $this->offset;
}
/**
* 控制分页显示风格（你可以增加相应的风格）
*
* @param int $mode
* @return string
*/
function show($mode=1)
{
switch ($mode)
{
case '1':
$this->next_page='下一页';
$this->pre_page='上一页';
return $this->pre_page().$this->nowbar().$this->next_page().'第'.$this->select().'页';
break;
case '2':
$this->next_page='下一页';
$this->pre_page='上一页';
$this->first_page='首页';
$this->last_page='尾页';
return $this->first_page().$this->pre_page().'[第'.$this->nowindex.'页]'.$this->next_page().$this->last_page().'第'.$this->select().'页';
break;
case '3':
$this->next_page='下一页';
$this->pre_page='上一页';
$this->first_page='首页';
$this->last_page='尾页';
return $this->first_page("page_box")."".$this->pre_page("page_box")."".$this->nowbar("page_box_a","page_box_b")."".$this->next_page("page_box")."".$this->last_page("page_box")."";
break;
case '4':
$this->next_page='下一页';
$this->pre_page='上一页';
return $this->pre_page().$this->nowbar().$this->next_page();
break;
case '5':
return $this->pre_bar().$this->pre_page().$this->nowbar().$this->next_page().$this->next_bar();
break;
}
}
function _set_url($url="")
{
if(!empty($url)){
$this->url=$url.((stristr($url,'?'))?'&':'?').$this->page_name."=";
}else{
if(empty($_server['query_string'])){
$this->url=$_server['request_uri']."?".$this->page_name."=";
}else{
if(stristr($_server['query_string'],$this->page_name.'=')){
$this->url=str_replace($this->page_name.'='.$this->nowindex,'',$_server['request_uri']);
$last=$this->url[strlen($this->url)-1];
if($last=='?'||$last=='&'){
$this->url.=$this->page_name."=";
}else{
$this->url.='&'.$this->page_name."=";
}
}else{
$this->url=$_server['request_uri'].'&'.$this->page_name.'=';
}
}
}
}
function _set_nowindex($nowindex)
{
if(empty($nowindex)){
if(isset($_get[$this->page_name])){
$this->nowindex=intval($_get[$this->page_name]);
}
}else{
$this->nowindex=intval($nowindex);
}
}
function _get_url($pageno=1)
{
global $_cfg;
$arr = $this->rewrite;
//print_r($arr);
//print_r($this->url.$pageno);
if($_cfg['urlrewrite'] && !empty($arr['action'])){
return url_rewrite($arr['action'], array('id0'=>$arr['id0'],'id1'=>$arr['id1'],'id2'=>$arr['id2'],'id3'=>$arr['id3'],'page'=>$pageno));
}else{
return $this->url.$pageno;
}}
function _get_text($str)
{
return $this->format_left.$str.$this->format_right;
}
function _get_link($url,$text,$style=''){
$style=(empty($style))?'':'class="'.$style.'"';
return ''.$text.'';
}
function error($function,$errormsg)
{
die('error in file '.__file__.' ,function '.$function.'() :'.$errormsg);
}
}
?>
